condition mean min max ZT0-3 745.1 745.1 745.1 ZT4-7 1057.8 1057.8 1057.8 ZT8-11 933.75 933.75 933.75 ZT12-15 727.6500000000001 727.6500000000001 727.6500000000001 ZT16-19 837.4 837.4 837.4 ZT20-23 825.45 825.45 825.45